I'd imagine there's a "minimum cars" clause in the rules or the FIA's agreement with Liberty somewhere, IIRC it came up when the Caterham and Marussia teams collapsed towards the end of 2014 which would have left just 18 cars.Since we're now seeing quite a few teams with financial difficulties
If a couple of them were lost, could we see teams fielding 3 drivers? It could be the only way to keep numbers on the field
That said, could you imagine having 6 cars all belonging to the Red Bull group, and the top 3 teams getting to all but dominate the points-paying positions? ?